class Computer {
	String brand;	//品牌
}
public class SxtStu {
	// field
	int id;
	String sname;
	int age;
	Computer comp;
	void study() {
		System.out.println("我正在学习！使用我们的电脑，"+comp.brand);
	}
	SxtStu() {
	}
	public static void main(String[] args) {
		SxtStu s = new SxtStu();
		s.sname = "张三";
		Computer c1 = new Computer();
		c1.brand = "联想";
		s.comp = c1;
		s.study();
	}
}